Crank-pin slide of direct-acting steam-pumps



(No Model.)

J. RGRISOOM. CRANK PIN SLIDE 01-" DIRECT AGTING STEAM PUMPS.

N0. 291,720. Patented Jan. 8, 1884.

JNVEJV'TOR;

WITNESSES "a Nl'lE ST ATFNT FFlCE.

JOHN P. GRISCOM, OF POTTSVILLE, PENNSYLVANIA.

CRANK-PIN SLIDE OF DIRECT-ACTING STEAM-PUMPS.

SPECIFICATION forming part of Letters Patent No. 291,720, dated January8, 1884:.

Application filed November 16, 1883. (No model.)

To all whom it may concern.-

Be it known that I, JOHN P. GRISCOM, a citizen of the United States, anda resident of Pottsville, Schuylkill county, Pennsylvania, have inventedcertain Improvements in (lrankdfin Slides of Direct Action Steam Pumps,of which the following is a specification.

My invention relates to the crank-pin slides of that class ofdirect-action steam-pumps in which the stroke of the piston-rods islimited by the cranks of a crank-shaft; and the main object of myinvention is to so construct crankpin slides that they can be readilyremoved from the crank-pins and guides without disturbing thecrank-shaft, a further object being to readily set up the bearing of thecranlrpin and the plates of the slide.

In the accompanying drawings, Figures 1 and 2 are diagrams showing theclass of steampumps to which my invention relates; Fig. 3, a perspectiveview of the crank-pin slide; Fig. 4, a vertical section of the same, andFig. 5 an end view looking in the direction of the arrow. Referring toFigs. 1 and 2, which represent in outline a duplex direct-actingsteam-pump, A A are the two steam-cylinders, and B B the twopump-barrels; D D, the two pistonrods, and E E the two cross-heads, eachof which has vertical guides for a slide, G-one slide for receiving thepin of one crank, and the other for receiving the pin of the other crankof a crank-shaft, H. These slides have heretofore been so constructedthat in order to remove them from the pins and guides when repairs wererequired it became necessary to raise the entire crank-shaft from itsbearings a difficulty which my invention has been mainly designed toobviate.

Referring to Figs. 3, 4, and 5, one portion of the bearing for thecrank-pin X is in the body M of the slide, the other portion of thehearing being in the block N, which is adjustable in a recess formed inthe said body, and is confined thereto by a follower, P, and stud-boltsa a, which are screwed into the body, pass through lugs d d on thefollower, and are provided with nuts 6 6, so that the bearing-block Ncan be set up when necessary. There are opposite side plates, R B, oneadjacent to each edge of the body M, these plates being adapted to theguides of the cross-head, and each plate having lugs f f and it hoverlapping the ends of the body, so that the latter can have nolongitudinal movement independently of the plates. Between these platesand the edges of the body intervene taper keys TT, through the heads itof which passes a stud-bolt, U, screwed into or otherwise secured tothebody, the bolt being provided with nuts w, by the adjustment of whichthe plates can be set up to the guides whenever such a proceedingbecomes necessary. The taper keys are narrower than the body M, andextend into grooves in the same, as will be seen by the perspectiveview, Fig. 3, and as the keys fit snugly, one between the lugs ff of oneplate and the other between the lugs ff of the other plate, the keysperform the additional duty of maintaining the said plates in theirproper lateral position on the body.

When it becomes necessary to remove the lb0"G-Cl6SC1lbd slide from thecrank-pin X, the nuts 0 are first detached from the stud-bolts a, afterwhich the follower P and block N can be withdrawn from the body in onedirection, and the body M, with its keys and plates, may be moved alongthe guides of the cross-head in the contrary direction, and finallywithdrawn from the said cross head.

The guides of the cross-head may be constructed to be set up against theslide, in which case the side plates, R R, and taper keys will bedispensed with, the remaining parts of the slide, however, remaining thesame for their ready withdrawal from the crank-pins without disturbingthe crank-shaft.

Devices other than those shown for adjusting the taper keys will readilysuggest themselves to expert mechanics.

I claim as my invention- 1. A cross-head slide in which the body M andblock N are combined with the follower P, and with bolts for confiningthe follower to the body and for adjusting the said block N,substantially as set forth.

2. The combination of the body M. the plates R R, and taper keys T Twith devices for the adjustment of the said keys, substantially asspecified.

3. The combination of the body M of the In testilnonywhereof Ihavesignedmy name slide and the plates R R with the taper keys to thisspecification in the presence of two '1 T, having heads t, that of onekey overlapsubscribing witnesses. ping the other, and with a stud-bo1t,U, sub- 5 stantially as described. JOHN P. GRISOOM.

4. The combination of the body M of the slide, the adjustable taper keysadapted to \Vitnesses: grooves in the edges of the body, and the J. H.FISTER, plates R R, having lugs between which fit the MORGAN FEED. 10said keys, substantially as set forth.

